. >> the oakland a's-- >> oh, oh (screams) >> the entire upper deck of the infrastructure has collapsed and fallen on the lower deck. from here we cannot tell what's beneath the upper deck, but one could only guess. >> megyn: look at those pictures. remember that, san francisco in '89? the aftermath of the quake that struck the pay area, telling nearly 70 people. now, some experts are warning of a potential disaster after a series of earthquakes shook portions of southern california yesterday. trace gallagher has the very latest on that live from l.a. trace? >> reporter: yeah, "america live" on the air, we had the cluster of earthquakes, back-to-back to back, it was in palm springs, you could feel them in san diego county, orange county, the strongest to hit southern california in more than three years. usgs finally came to 4.7 magnitude of those. no real damage, no injuries. that's the good news. the bad news, some believe this wasn't a stand alone quake, but a foreshock of something bigger. listen. >> and it's possible that there will be larger events, always a 5% chance that one of t